Ranging Circuit Spoofing Detection via Spatial and Temporal Consistency
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Solution Overview
Problem
Vehicles are vulnerable to spoofing signals that interfere with ranging circuits, leading to inaccurate location determination and compromised safety functions such as cruise control and collision detection.
Innovation Solution
A spoofing detection system that includes a spoofing detection circuit communicatively coupled to a ranging circuit group, which requests and analyzes range measurements from multiple ranging circuits to estimate target vehicle locations, checks for spatial and temporal consistency, and initiates mitigation actions when inconsistencies are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ranging circuits are used to detect target vehicle location, then vehicle safety functions (cruise control, collision detection) are enabled, but the system becomes vulnerable to spoofing signals that cause inaccurate location determination
Solution Approach 1:
The patent introduces a deception detection circuit as an intermediary component that mediates between the ranging circuits and the vehicle control system. This circuit receives range measurements from multiple ranging circuits, estimates target locations, and validates their consistency before accepting the data. The intermediary validates measurements by checking whether estimated locations from different ranging circuits are consistent with each other, thereby filtering out spoofing signals that would otherwise cause inaccurate location determination.
2Measurement precision
If multiple ranging circuits are deployed to improve location accuracy, then measurement precision increases, but device complexity and computational requirements increase
Solution Approach 1:
The patent divides the deception detection functionality into discrete, modular components: individual ranging circuits that independently measure range, a deception detection circuit that receives and processes measurements from multiple ranging circuits, and location estimation logic that calculates positions based on combined measurements. This segmentation allows the system to achieve improved location precision through multiple sensors while managing complexity by organizing functions into separate, manageable modules with defined interfaces.
3Reliability
If spoofing detection and mitigation functions are added, then system reliability against attacks is improved, but processing time and computational load increase
Solution Approach 1:
The patent implements preliminary validation of range measurements by continuously monitoring the consistency of location estimates from multiple ranging circuits before spoofing attacks can compromise the system. The deception detection circuit pre-establishes validation criteria for acceptable location estimates and performs real-time consistency checks on incoming measurements. This preliminary action enables the system to detect and reject spoofing signals promptly, maintaining reliability while minimizing processing delays by having validation rules ready in advance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively detects and mitigates spoofing signals, preventing interference with vehicle safety functions and enhancing overall safety by ensuring accurate location determination.
Implementation Method 1
a radar system on the vehicle that includes transmitters configured to transmit a radar waveform in multiple directions towards one or more obstructions. As the transmitted waveform reflects off an obstruction, a receiver of the radar system measures parameters of the reflections and based on these measured parameters, determines a distance between the vehicle and the obstruction
Data Source
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AI summary
To detect a spoofing signal transmitted by an attacker, a spoofing detection circuit forms a ranging circuit group by first selecting two or more ranging circuits each disposed at different locations. The spoofing detection circuit then requests and receives a set of measurements over a period of time from each ranging circuit in the ranging circuit group. Based on the received sets of measurements, the spoofing detection circuit estimates one or more locations for a target, a path of the target, or both. The spoofing detection circuit then determines whether the estimated locations or path of the target indicate spatial consistency or temporal consistency. Based on the estimated locations, estimated path, or both not indicating a spatial consistency, temporal consistency, or both, the spoofing detection circuit determines that a spoofing signal was received by the ranging circuit group.